File indexing completed on 2024-05-19 04:26:40 

0001 /*
0002  *  SPDX-FileCopyrightText: 2013 Dmitry Kazakov <dimula73@gmail.com>
0003  *
0004  *  SPDX-License-Identifier: GPL-2.0-or-later
0005  */
0006 
0007 #ifndef __KIS_WRAPPED_VLINE_ITERATOR_H
0008 #define __KIS_WRAPPED_VLINE_ITERATOR_H
0009 
0010 #include "kis_iterator_ng.h"
0011 #include "kis_wrapped_rect.h"
0012 
0013 class WrappedVLineIteratorStrategy
0014 {
0015 private:
0016     static const int TOP_OFFSET = 0;
0017     static const int BOTTOM_OFFSET = 2;
0018 
0019 public:
0020     typedef KisVLineIteratorSP IteratorTypeSP;
0021 
0022     WrappedVLineIteratorStrategy()
0023         : m_splitRect(0)
0024         , m_iteratorColumnStart(KisWrappedRect::TOPLEFT)
0025         , m_lastColumnCoord(-1)
0026     {
0027     }
0028 
0029     inline QSize originalRectToColumnsRows(const QRect &rect) {
0030         return QSize(rect.height(), rect.width());
0031     }
0032 
0033     inline QPoint columnRowToXY(const QPoint &pt) const {
0034         return QPoint(pt.y(), pt.x());
0035     }
0036 
0037     inline IteratorTypeSP createIterator(KisDataManager *dataManager,
0038                                          const QRect &rc,
0039                                          qint32 offsetX, qint32 offsetY,
0040                                          bool writable,
0041                                          KisIteratorCompleteListener *completeListener) {
0042 
0043         return new KisVLineIterator2(dataManager,
0044                                      rc.x(), rc.y(),
0045                                      rc.height(),
0046                                      offsetX, offsetY,
0047                                      writable,
0048                                      completeListener);
0049     }
0050 
0051     inline void completeInitialization(QVector<IteratorTypeSP> *iterators,
0052                                        KisWrappedRect *splitRect) {
0053         m_splitRect = splitRect;
0054         m_iterators = iterators;
0055 
0056         m_lastColumnCoord = m_splitRect->topLeft().right();
0057     }
0058 
0059     inline IteratorTypeSP leftColumnIterator() const {
0060         return m_iterators->at(m_iteratorColumnStart + TOP_OFFSET);
0061     }
0062 
0063     inline IteratorTypeSP rightColumnIterator() const {
0064         return m_iterators->at(m_iteratorColumnStart + BOTTOM_OFFSET);
0065     }
0066 
0067     inline bool trySwitchIteratorStripe() {
0068         bool needSwitching = leftColumnIterator()->x() == m_lastColumnCoord;
0069 
0070             if (needSwitching) {
0071                 if (m_iteratorColumnStart == KisWrappedRect::TOPLEFT &&
0072                     m_iterators->at(KisWrappedRect::TOPRIGHT)) {
0073 
0074                     m_iteratorColumnStart = KisWrappedRect::TOPRIGHT;
0075                     m_lastColumnCoord = m_splitRect->topRight().right();
0076                 } else /* if (m_iteratorColumnStart == KisWrappedRect::TOPRIGHT) */ {
0077                     m_iteratorColumnStart = KisWrappedRect::TOPLEFT;
0078                     m_lastColumnCoord = m_splitRect->topLeft().right();
0079 
0080                     Q_FOREACH (IteratorTypeSP it, *m_iterators) {
0081                         if (it) {
0082                             it->resetColumnPos();
0083                         }
0084                     }
0085                 }
0086             }
0087 
0088             return needSwitching;
0089     }
0090 
0091     inline void iteratorsToNextRow() {
0092         leftColumnIterator()->nextColumn();
0093         if (rightColumnIterator()) {
0094             rightColumnIterator()->nextColumn();
0095         }
0096     }
0097 
0098     inline bool trySwitchColumnForced() {
0099         leftColumnIterator()->resetPixelPos();
0100         if (rightColumnIterator()) {
0101             rightColumnIterator()->resetPixelPos();
0102         }
0103 
0104         return true;
0105     }
0106 
0107 private:
0108     KisWrappedRect *m_splitRect;
0109     QVector<IteratorTypeSP> *m_iterators;
0110     int m_iteratorColumnStart; // may be either KisWrappedRect::TOPLEFT or KisWrappedRect::TOPRIGHT
0111     int m_lastColumnCoord;
0112 };
0113 
0114 #include "kis_wrapped_line_iterator_base.h"
0115 typedef KisWrappedLineIteratorBase<WrappedVLineIteratorStrategy, KisVLineIteratorNG> KisWrappedVLineIterator;
0116 
0117 
0118 #endif /* __KIS_WRAPPED_VLINE_ITERATOR_H */